Related Experiment Videos
Human autoantibody binding to multiple conformations of DNA
Biochemistry International
|March 1, 1992
Summary
Autoantibodies in systemic lupus erythematosus (SLE) and rheumatoid arthritis target various DNA forms. Non-native DNA structures like A-DNA or Z-DNA may trigger the immune response against native DNA.
Area of Science:
- Immunology
- Molecular Biology
- Rheumatology
Background:
- Systemic lupus erythematosus (SLE) and rheumatoid arthritis are autoimmune diseases characterized by autoantibodies targeting self-antigens.
- These autoantibodies often react with nucleic acids and nuclear components.
Purpose of the Study:
- To investigate the reactivity of autoantibodies from SLE patients against different DNA conformations.
- To explore the potential immunogenic role of various DNA structures in autoimmune diseases.
Main Methods:
- Analysis of autoantibody reactivity using native calf thymus DNA (B-form), DNA.RNA hybrid (A-form), and left-handed Z-form DNA.
- Inhibition studies to elucidate antibody binding specificities.
Main Results:
- Autoantibodies from SLE sera demonstrated reactivity with B-form, A-form, and Z-form DNA.
- Inhibition studies indicated that antibodies recognize distinct polymer conformations.
Conclusions:
- Antibodies in SLE sera recognize multiple DNA conformations.
- A-DNA or Z-DNA may act as the initial immunogenic stimulus, leading to cross-reactivity with native DNA.